1420139 has 4 divisors (see below), whose sum is σ = 1623024. Its totient is φ = 1217256.

The previous prime is 1420123. The next prime is 1420151. The reversal of 1420139 is 9310241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1420139 - 2⁴ = 1420123 is a prime.

It is a super-3 number, since 3×1420139³ = 8592386763330436857, which contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1420139.

It is not an unprimeable number, because it can be changed into a prime (1420109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101432 + ... + 101445.

It is an arithmetic number, because the mean of its divisors is an integer number (405756).

2^1420139 is an apocalyptic number.

1420139 is a deficient number, since it is larger than the sum of its proper divisors (202885).

1420139 is an equidigital number, since it uses as much as digits as its factorization.

1420139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202884.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1420139 is about 1191.6958504585. The cubic root of 1420139 is about 112.4027538237.

The spelling of 1420139 in words is "one million, four hundred twenty thousand, one hundred thirty-nine".